GbE2c Ethernet Blade Switch MGMT IP Configuration

Dear Sir: I am contacting you because I would need your support in order to configure the mgmt IP address and default gateway for my GbE2c Ethernet Blade Switch.I tried configure it according to the user guide but my switch is unable to being accessed from other networks. I think there is problem with my default gateway configuration. I can connect to it in the same IP network using telnet, but not from other Ip networks.I did not restart the switch after changing the IP address and GW1 configuration, is it needed?I will be looking forward to hearing from you.Regards